docs: def get_annotation_entry_names(self, url: str) -> Set[str]:
          """Return a dict of annotations and their labels for the given annotation file.
  
          :param url: the location of the annotation file
          """
          annotation = self.get_or_create_annotation(url)
          return {
              x.name
              for x in self.session.query(NamespaceEntry.name).filter(NamespaceEntry.namespace == annotation)
          }